## Why 69 is not a prime number?

For 69 to be a prime number, it would have been required that 69 has only two divisors, i.e., itself and 1. However, 69 is a semiprime (also called biprime or 2-almost-prime), because it is the product of a two non-necessarily distinct prime numbers. Indeed, 69 = 3 x 23, where 3 and 23 are both prime numbers.

**What is the HCF of 12 18 and 24?**

6

**What are factors of 80?**

Factor of 80

- Factors of 80: 1, 2, 4, 8, 10, 20, 40, and 80.
- Prime Factorization of 80: 80 = 24 × 5.

### What is the HCF of two prime numbers p and q?

one

**What is the greatest prime factor of 100?**

The factors of 100 are: 1 × 100, 2 × 50, 4 × 24, 5 × 20, 10 ×10. The greatest prime factor of 100 is 5 = n.

**What is the highest factor of 80?**

The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40 and 80. Prime factorization can help us find all the factors of 80.

#### What factors are common to 15 and 30?

The factors of 30 are 1, 2, 3, 5, 10, 15, and 30. The common factors of 15 and 30 are 1, 3, 5, and 15.

**Are 4 and 15 relatively prime?**

relatively prime (unrelated, strangers)…OVERLAPPING.

4 | 15 | |
---|---|---|

7 | 28 | 105 |

3 | 84 | 315 |

5 | 420 | 1575 |

**Is 169 and 299 relatively prime?**

Which pair of numbers are relatively prime? 77 and 791 35 and 36 22 and 55 169 and 299. 35 and 36 are relatively prime. This answer has been confirmed as correct and helpful.

## What is the largest prime factor of 80?

80 = 1 x 80, 2 x 40, 4 x 20, 5 x 16, and 8 x 10. Factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80. Prime factorization: 80 = 2 x 2 x 2 x 2 x 5 which can also be written 80 = 2⁴ x 5.

**What is the LCM of 69?**

Least Common Multiple – 69

Numbers | LCM |
---|---|

69 and 2 | 138 |

69 and 3 | 69 |

69 and 4 | 276 |

69 and 5 | 345 |

**What number has only 2 factors?**

Identify Prime and Composite Numbers Other numbers, such as 7 , have only two factors: 1 and the number. A number with only two factors is called a prime number. A number with more than two factors is called a composite number. The number 1 is neither prime nor composite.

### What are factors of 70?

Factors of 70 are: 1, 2, 5,7,14, 10, 35 and 70 = 8 factors.

**How do you find the HCF of a prime number?**

HCF by Prime Factorization

- Find the prime factors of each of the given number.
- Next, we identify the common prime factors of the given numbers.
- We then multiply the common factors. The product of these common factors is the HCF of the given numbers.

**Why 69 is composite number?**

A composite number is a number that can be divided evenly by more numbers than 1 and itself. The number 69 can be evenly divided by 1, 3, 23 and 69, with no remainder. Since 69 cannot be divided by just 1 and 69, it is a composite number.

#### Is the HCF of two distinct prime number is 1?

The H.C.F. of two co-prime number is 1 The H.C.F. of an even and an odd numbers is 1. The H.C.F. of two consecutive even number is 2.

**What is the factors of 100?**

Factors of 100

- Factors of 100: 1, 2, 4, 5, 10, 20, 25, 50, and 100.
- Factors of -100: -1, -2, -4, -5, -10, -20, -25, -50 and -100.
- Prime Factorization of 100: 100 = 22 × 52

**What is the factors of 69?**

Factors of 69

- Factors of 69: 1, 3, 23 and 69.
- Prime Factorization of 69: 69 = 3 × 23.

## What is HCF of co-prime numbers?

The HCF of two coprime numbers is always 1. For example, 5 and 9 are coprime numbers, and hence, HCF (5, 9)=1. For example, 5 and 9 are coprime numbers. Hence, LCM (5,9) = 45.

**What is the smallest natural number?**

The first is smallest natural number n so the smallest natural number is 1 because natural numbers go on. The smallest whole number is 0 because whole number start from zero and the go all the way up to Infinity. So they start from zero and up to Infinity largest natural number.